Wood-turning machine



J. HERZOG.

WOOD TURNlNG MACHINE.

APPLICATION FILED JULY 8.1918.

1,343,319. Patented June 15, 1920.

2 SHEETSSHEET l.

IIIII *iI'lllllllllllllllllllllllll "IfllllllfllIllllllllllllllllllllll1 l I W INVENTOR R EY J. HERZOG.

WOOD TURNiNG MACHINE.

APPLICATION FILED JULY 8. 1918.

Patented June 15, 1920.

2 SHEET SSHEET 2.

ATTORNEY UNITED STATES OFFICE.

JOHN HERZOG, OF SAGINAW, MICHIGAN.

WOOD-TURNING MACHINE.

Specification of Letters latent.

Patented June 15, 1920.

Application filed July 8, 1918. Serial No. 243,949.

To all whom z't may concern:

Be it known that I, JOHN Hnnzoe, a citizen of the United States,residing at Saginaw, in the county of Saginaw and State of Michigan,have invented certain new and useful Improvements in Wood-TurningMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to wood turning machines and pertains moreparticularly to a machine adapted for use in the manufacture of panelshaving warped, bowed or curved surfaces.

Such panels are commonly employed in the construction of talkingmachines and certain styles of furniture.

In certain approved designs of talking machine cabinets the panels areof the form illustrated in this specification and my improved turningmachine will bedescribed as it is used in the manufacture of suchpanels, although it will be understood that many other shapes may beproduced.

The objects of my improvement are, first, to provide a relativelyinexpensive machine for shaping the front and back surfaces of abuilt-up wooden form, producing a panel with warped surfaces.

Further objects are to provide a simple means of clamping the panel tothe rotating face-plate and means for quickly and accurately setting thecutting tools and moving them along the Work, whereby the entire area ofthe panel may be cut with only a relatively small movement of thecutting tools. For example, if a panel is thirty inches long its entirearea can be covered by a total lateral travel of the cutting tools ofapproximately four inches, thereby saving time and increasing theaccuracy of the work.

With the foregoing and certain other ob jects in view which will appearlater in the specification, my invention comprises the devices describedand claimed and the equivalents thereof.

In the drawings, Figure 1 is a side elevation of a duplex machine, theleft-hand turning mechanism adapted for turning the exterior of thepanel and the right-hand mechanism adapted to simultaneously shape theinterior.

Fig. 2 is a front View of the machine.

Fig. 3 is a top plan view of one of the spring-pressed tool bars.

Figf Jt is a side elevation of the parts shown in Fig. 3.

Figs. 5 and 6 are respectively diagrammatic views of the master patternsemployed in turning the exterior and interior faces of the anels.

Fig. is a diagrammatic plan view showing the relative arrangement of thepanel, the master pattern and the cutting tools.

Fig. 8 is a perspective view of one of the Work-holding lugs.

As is clearly shown in the drawings, the machine consists in a revolublework-carrying face-plate 1 operated by a driving pulley 2 carried by asuitable base 3. Each panel 4 is secured to the face-plate preferably bymeans of pins 5-Figs. 2 and 8received in holes 6 bored in the edges ofthe panels 4. The pins 5 are carried by brackets 7 mounted on adjustableplates 8. The plates 8 are secured to the face-plate 1 by clamping bolts9 engaged in slotted holes in the plates.

The panel to be turned is secured to faceplate 1 by engaging the holesof oneedge of the panel with the pins of one of the adjustable platesand then lowering the opposite plate until its pins engage the holes inthe opposite edge of the panel, and clamping the adjustable plate inposition by means of the bolts 9.

A plurality, preferably four, of panels may be arranged on oneface-plate as shown in Figs. 1 and 2.

The exposed faces of the panels are then shaped by means of the cuttingtools, the arrangement of which will now be described.

Upon a pedestal 10 is mounted a movable slide 11 capable of being movedtoward or away from the face of revoluble plate 1 by means of thehand-wheel 12. The slide 11 moves on ways 13, as in a lathe or planer.

Upon the slide 11 a tool carriage 14 is mounted. This carriage isslidable length? wise and travels in a direction parallel with the planeof plate 1, as indicated by the arrows in Fig. 2.

A number of tool bars 15 are mounted on carriage 14:, each tool barbeing capable of adjustment on the carriage 14 toward and from the work.A guide roller 16-Fig. &is secured to the under side of each tool barand engages the curved working face of a master pattern 1'? fixed to themovable slide 11. The tool bar 15 is normally pressed forward or towardthe work by a spring 18, one end of which takes against a lug 19 securedto the tool bar, the other end being inclosed in a tube 20. The springis compressed by engagement between the cap on the end of the tube andthe lug 19, so asto press the bar 15 forward and keep the guide roller16 normally in yielding contact with the working edge of the masterpattern 17. The tube 20 is adjustably clamped to the tool carriage 14 bya set screw 21. By forcing the tube further in, that is, toward thework, the degree of compression of the spring 10 and consequently thepressure of the roller 16 against the master pattern may be increased.Thus by properly setting the tube 20 before tightening the screw 21, anydesired degree of forward pressure of the tool toward the work may besecured and the tool is always yieldingly held against the work with thedesired amount of force.

In operation, the guide rollers 16 limit the forward movement of thetools so that when the face of the work has been reduced to the propercontour the tools will cease cuttin large number of tools, spaced quiteclose together, is preferably provided on the tool carriage 14:, asshown in Fig. 2. As many tools may be employed as desired. In some casesit is desirable to use all of the tools simultaneously and in othercases the work can be better done by using only alternate tools. Thetools that are not used In practice I have found it convenient to locatethe cutting tools about four inches apart, measured radially on thefaceplate. The tools being set, the face-plate carrying the work isrevolved at a proper cutting speed by means of the drive pulley 2 andthe tools areall fed forward simultaneously by advancing the carriage14, the carriage being moved by hand-wheel 12. hen several of the toolshave commenced to cut transverse grooves in the panels, the toolcarriage 14 is slowly traversed in the direction of the arrows-Fig. 2-bymeans of the hand-wheel 22, beveled gears 23, lead screw 24: and thethreaded nut 25, which is fixed to the carriage 14.

The total sidewise travel of the tools is slightly greater than thedistance between successive tools, so that the part of the surface cutby one tool will overlap the cut of the adjacent tool, the series oftools thereby covering the entire length of the panel.

If any tool meets an obstruction or hard spot in the work, its spring 18will allow the tool to retract, preventing splintering the work orbreaking the tool.

In practice I have found that with this machine the turning of warpedpanels both on their inside and outside faces can be accurately andreadily accomplished in a very rapid manner and with a minimum of labor.

While I have shown and described a duplex machine in which one system ofcutters is used for shaping the exterior and the other system of cuttersfor shaping the interior faces of panels, it is apparent that if desiredthe two operations may be performed by indepedent machines.

The claims of this case are confined to my machine, broader aspects ofthe invention being presented in my copending application, Serial Nov243,950.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In a wood panel turning machine, the combination of a revolubleface-plate, panelholding devices thereon, a movable slide adjustabletoward and from said face-plate, a master pattern fixed to said slideand located in proximity to the face of said disk and paralleltherewith, a tool carriage laterally movable 011 said slide, a pluralityof independent longitudinally movable springpressed tool-carrying barsslidingly mounted on said carriage, said bars spaced apart andyieldingly engaging the working edge of said pattern, and means adaptedto simultaneously traverse said carriage and tool bars along saidpattern, the sidewise travel of each bar being slightly greater than thedistance apart of successive bars.

2. I11 a wood panel turning machine, the combination of a revolubleface-plate, panelholding devices carried thereby, a master patternlocated in proximity to the face of said disk and parallel therewith,said pattern adjustable toward and from said disk; a plurality ofindependent longitudinally movable spring-pressed tool-carrying bars,said bars spaced apart and yieldingly engaging the working edge of saidpattern, and means adapted to simultaneously traverse said tool barssidewise along said pattern, the lateral travel of each bar beingslightly greater than the distance apart of successive bars.

3. In a wood panel turning machine, the combination of a revolubleface-plate, panelholding devices carried thereby, a tool-carryingcarriage capable of movement toward and from the plane of saidface-plate and also parallel with said plate, a plurality oflongitudinally movable spring-pressed toolcarrying bars spaced apart onsaid carriage, a master pattern located beneath said carriage andprojections on said tool bars normally engaging the working edge of saidpattern.

4. In a wood panel turning machine, the combination of a revoluble faceplate, panelholding devices carried thereby, a tool-carrying carriagecapable of movement toward and from the face of said face plate and alsoparallel therewith, a plurality of independently movable tool-carryingbars spaced apart on said carriage, and a master pattern adapted tooperatively control the movement of said bars.

5. In a Wood panel turning machine, the combination of a revoluble faceplate, panelholding devices carried thereby, a tool-carrying carriagecapable of movement toward and from the plane of said face plate andalso parallel therewith, a plurality of independently movabletool-carrying bars spaced apart on said carriage and extendingapproximately the length of the panel, a master pattern adapted tooperatively control the movement of said bars, andmeans for moving saidcarriage in a direction par allel to said face plate, the length of saidmovement being approximately equal to the distance between thesuccessive tools, for the 20 purposes set forth.

In testimony whereof I affix my signature.

JOHN HERZOG.

